/*
 * This file is part of Hopsworks
 * Copyright (C) 2020, Logical Clocks AB. All rights reserved
 *
 * Hopsworks is free software: you can redistribute it and/or modify it under the terms of
 * the GNU Affero General Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * Hopsworks is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.  See the GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License along with this program.
 * If not, see <https://www.gnu.org/licenses/>.
 */

package io.hops.hopsworks.common.jupyter;

import io.hops.hadoop.shaded.org.apache.commons.io.FileUtils;
import io.hops.hopsworks.common.dao.jupyter.JupyterSettingsFacade;
import io.hops.hopsworks.common.integrations.LocalhostStereotype;
import io.hops.hopsworks.common.util.Settings;
import io.hops.hopsworks.persistence.entity.jupyter.JupyterSettings;
import io.hops.hopsworks.persistence.entity.project.Project;
import io.hops.hopsworks.persistence.entity.user.Users;

import javax.ejb.EJB;
import javax.ejb.Stateless;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.Path;
import java.nio.file.Paths;

import static io.hops.hopsworks.common.jupyter.JupyterJWTManager.TOKEN_FILE_NAME;

@Stateless
@LocalhostStereotype
public class LocalJupyterJWTTokenWriter implements JupyterJWTTokenWriter {
  @EJB
  private JupyterSettingsFacade jupyterSettingsFacade;
  @EJB
  private Settings settings;
  
  @Override
  public String readToken(Project project, Users user) throws IOException {
    JupyterSettings jupyterSettings = jupyterSettingsFacade.findByProjectUser(project, user.getEmail());
    Path tokenFile = Paths.get(settings.getStagingDir(), Settings.PRIVATE_DIRS, jupyterSettings.getSecret(),
      TOKEN_FILE_NAME);
    return FileUtils.readFileToString(tokenFile.toFile(), Charset.defaultCharset());
  }
}